Daughter Guillermina was diagnosed with a rare retinal cancer in 2006 that left her without vision.

Caballero quit club football at Spanish side Elche to return to his homeland and dedicate his time to the three-year-old.

Thankfully, Guillermina made a full recovery. But the memories are constantly with Caballero.

Jan Kruger - The FA

Recovered: Caballero's daughter made a full recovery and her dad is now in the prime of his career

He said: “The worst moment in my life was back in 2006, when my daughter was diagnosed with an eye cancer.

“It was a case in a million. It’s unbelievable that someone so young must suffer from something like that.

“We had to go through that as a family. We suffered a lot for six months.

“In fact, I had to quit football. I went back to Argentina to play at Arsenal Sarandi – but I hardly played there. I didn’t even want to play. And I didn’t care about it.

“I just needed to be in Argentina helping out my daughter Guillermina and my wife. I needed to be with them.

“Fortunately, Guillermina is recovered nowadays and she is so very happy.

Angel Martinez

Revival: Caballero's form at Malaga earned him a move to City this summer

“When you go through that kind of experience, you always ask yourself, ‘Why me?’ But my wife Lucia told me that it was useless, as that question had no answer.

“It was a turning point in my career. An enormous test. My daughter was an example for me.”

Now in England, Caballero is trying to make a name for himself as a Premier League star.

He said: “I hope to do at Man City what I did at Malaga. I have to be honest, there were lots of rumours about me during the transfer market, but I only talked to City. But it’s true that Barcelona and Monaco were after me and knocked on my door.

“Now I want to be the goalkeeper of Man City. Then I would like to play for the Argentina team. But I need to play here first.”